package com.czc.service.impl;

import com.czc.constant.CrowdConstant;
import com.czc.entity.Admin;
import com.czc.entity.AdminExample;
import com.czc.exception.LoginAcctAlreadyInUseException;
import com.czc.exception.LoginAcctAlreadyInUseForUpdateException;
import com.czc.exception.LoginFailedException;
import com.czc.mapper.AdminMapper;
import com.czc.mvc.handler.testHandler;
import com.czc.service.api.AdminService;
import com.czc.util.CrowdUtil;
import com.github.pagehelper.PageHelper;
import com.github.pagehelper.PageInfo;
import org.slf4j.Logger;
import org.slf4j.LoggerFactory;
import org.springframework.beans.factory.annotation.Autowired;
import org.springframework.dao.DuplicateKeyException;
import org.springframework.security.crypto.bcrypt.BCryptPasswordEncoder;
import org.springframework.stereotype.Service;

import java.text.SimpleDateFormat;
import java.util.Date;
import java.util.List;
import java.util.Objects;

@Service
public class AdminServiceImpl implements AdminService {

    @Autowired
    private AdminMapper adminMapper;

    private Logger logger = LoggerFactory.getLogger(AdminServiceImpl.class);

    @Autowired
    private BCryptPasswordEncoder passwordEncoder;

    @Override
    public void saveAdmin(Admin admin) {

        //1.密码加密
        String userPswd = admin.getUserPswd();
        //userPswd=CrowdUtil.md5(userPswd);
        userPswd=passwordEncoder.encode(userPswd);
        admin.setUserPswd(userPswd);

        //2.生成创建时间
        Date date=new Date();
        SimpleDateFormat format = new SimpleDateFormat("yyyy-MM-dd HH:mm:ss");
        String createTime = format.format(date);
        admin.setCreatTime(createTime);

        //3.执行保存
        try{
            adminMapper.insert(admin);
        }catch (Exception e){
            e.printStackTrace();
            logger.info("异常全类名"+e.getClass().getName());

            if(e instanceof DuplicateKeyException){
                throw new LoginAcctAlreadyInUseException(CrowdConstant.MESSAGE_LOGIN_ACCT_ALREADY_IN_USE);
            }
        }


    }

    @Override
    public List<Admin> getAll() {
        return adminMapper.selectByExample(new AdminExample());
    }

    @Override
    public Admin getAdminByLoginAcct(String loginAcct, String userPswd)
    {
        // 1.根据登录账号查询Admin对象
        // 1.1创建AdminExample对象
        AdminExample adminExample = new AdminExample();
        // 1.2创建criteria对象
        AdminExample.Criteria criteria = adminExample.createCriteria();
        // 1.3在criteria对象中封装查询条件
        criteria.andLoginAcctEqualTo(loginAcct);
        // 1.4调用AdminMapper的方法执行查询
        List<Admin> list = adminMapper.selectByExample(adminExample);

        // 2.判断Admin对象是否为null
        if(list==null || list.size()==0){
            throw new LoginFailedException(CrowdConstant.MESSAGE_LOGIN_FAILED);
        }

        if(list.size()>1){
            throw new RuntimeException(CrowdConstant.MESSAGE_SYSTEM_ERROR_LOGIN_NOT_UNIQUE);
        }


        // 3.如果Admin对象为null抛出异常
        Admin admin = list.get(0);

        if(admin==null){
            throw new LoginFailedException(CrowdConstant.MESSAGE_LOGIN_FAILED);
        }

        // 4.如果Admin对象不为null则将数据库密码从Admin对象中取出
        String userPswdDB = admin.getUserPswd();

        // 5.将表单提交的明文密码进行加密
        String userPswdForm= CrowdUtil.md5(userPswd);

        // 6.对密码进行比较  Objects.equals会先自动判断两个数据是不是同一个类型,是同一个类型进行比较
        if(!Objects.equals(userPswdDB,userPswdForm)){
            // 7.如果比较结果是不一致则判处异常
            throw new LoginFailedException(CrowdConstant.MESSAGE_LOGIN_FAILED);
        }

        // 8.如果一致则返回Admin对象
        return admin;
    }

    @Override
    public PageInfo<Admin> getPageInfo(String keyword, Integer pageNum, Integer pageSize) {

        //1.调用PageHelper的静态方法开启分页功能
        //这里充分体现了PageHelper的‘非侵入式’设计 原本要做的查询不必有任何修改
        PageHelper.startPage(pageNum,pageSize);

        //2.执行查询
        List<Admin> list = adminMapper.selectAdminByKeyword(keyword);

        //3.封装到pageinfo对象中
        return new PageInfo<>(list);
    }

    @Override
    public void remove(Integer adminId) {
        adminMapper.deleteByPrimaryKey(adminId);
    }

    @Override
    public Admin getAdminById(Integer adminId) {
        return adminMapper.selectByPrimaryKey(adminId);
    }

    @Override
    public void update(Admin admin) {
        // Selective 表示有选择的更新  对于null值不更新
        try {
            adminMapper.updateByPrimaryKeySelective(admin);
        } catch (Exception e) {
            e.printStackTrace();
            logger.info("异常全类名"+e.getClass().getName());

            if(e instanceof DuplicateKeyException){
                throw new LoginAcctAlreadyInUseForUpdateException(CrowdConstant.MESSAGE_LOGIN_ACCT_ALREADY_IN_USE);
            }
        }


    }

    @Override
    public void saveAdminRoleRelationship(Integer adminId, List<Integer> roleIdList) {
        /*
            旧数据如下
            adminId    roleId
            1              1(要删掉的)
            1              2(要删掉的)
            1              3
            1              4
            新数据如下
            adminId    roleId
            1              3(本来就有)
            1              4(本来就有)
            1              5(新的)
            1              6(新的)
         */
        //为了简化操作:先根据adminId删除旧数的数据再保存全部新的数据
        adminMapper.deleteOldRelationship(adminId);

        //根据roleIdList和adminId保存新的数据
        if(roleIdList!=null&& roleIdList.size()>0){
            adminMapper.insertNewRelationship(adminId,roleIdList);
        }
    }

    @Override
    public Admin getAdminByLoginAcct(String username) {
        AdminExample adminExample = new AdminExample();

        AdminExample.Criteria criteria = adminExample.createCriteria();

        criteria.andLoginAcctEqualTo(username);

        List<Admin> list = adminMapper.selectByExample(adminExample);

        Admin admin = list.get(0);


        return admin;

    }
}
